Preppers/survival

The whole pandemic experience eroded my faith in humanity. There's no doubt that when humanity works together, we can accomplish much. There is also no doubt in my mind that there's somebody whose first thought is to hoard toilet paper.

I suppose if we could all work together on enlightened harmony, the Kyoto Protocol would have fixed the climate back even it could have saved lots of people.

It’s the temperature a thermometer will get to through evaporative cooling. You measure it by putting a wet cloth on the bulb of a thermometer and letting the water evaporate.

Essentially, your body cools you down by sweating, but if you reach a combination of sweat and heat above a certain degree, your body is unable to cool you down by sweating, as the air already has enough moisture and its hotter than your sweat.

Then you lose the ability to regulate your heat and you rapidly head towards a heat stroke.

Ok I found this I think I get it https://en.m.wikipedia.org/wiki/Wet-bulb_temperature

"It's a dry heat" isn't just a cliche.

It isn't the temperature, it's the humidity.

Wet bulb is a way measure how much evaporative cooling you can have. Once wet bulb gets to 95°F even a healthy fit individual will die given enough time even in the shade with a fan. It might be 112 but as long as the wet bulb stays below 95°F your body can cool with sweat. Any higher wet bulb the human body only heats up from the environment and can no longer cool, eventually leading to fatal hyperthermia (heat exhaustion and heat stroke).

That is exactly the conditions humans are adapted for: high arid heat. We are the world champions of sweating to stay cool, but that does nothing in humid weather. At high humidity, the temperature only needs to be near body temperature to kill you.

That's likely dry bulb temperature. Wet bulb temperature is lower except at 100% humidity

I do my own building, construction and renovation ... did some commercial work but never enough to want to do it for a living ... I know enough to do my own but not enough to call myself a pro.

From what I've learned about underground building is that it is very dangerous and a health hazard. You have to constantly monitor and create safety measures for gases and oxygen levels. Even with the best setups ... actually with super sealed setups ... it can be very dangerous without active monitoring. Carbon dioxide, monoxide, and many gases will naturally want to drift to lower levels and displace oxygen which wants to move up ... if you happen to be unlucky to have a generator or car running next to your exit/entry hole ... your underground space quickly loses oxygen and without monitoring equipment or alarms, you just get dizzy, fall asleep and die .... very gentle death because you will never know what happened.

There was a news story a year or two ago ... in Australia I think? .. of a farmer that crawled into an underground reservoir that was empty to repair it ... his generator or vehicle was running nearby and he lost consciousness inside and died ... it's actually a common enough occurrence for farmers and industrial workers and construction workers

Anyone who is even thinking of building anything underground has to know and understand this dangerous fact